Just as man took to the skies like a bird with the airplane, Scuba gear is man’s way of taking the plunge to explore the blue world underwater. Scuba Diving is an amazing way to discover what nature has in store for us with 70% of our planet covered in water. For those unfamiliar with the sport the equipment a diver uses may seem complicated and a little daunting to try, but this guide aims at pointing out the basic Scuba gear a diver uses and how it works. If you choose to take up diving, a part of your Scuba diving certification training is dedicated to the diving equipment, how to assemble it and how to use it safely and responsibly.
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Mask & Snorkel: Needless to say Dive Masks are your windows to the underwater world. Keeping water out of your eyes and making your view of coral, fish, sea mammals and other life that much more clearer. Masks prove very important as they are have an air pocket in front of your face which allows you to equalize your ears while descending. The snorkel on the other hand is not really considered a necessity but proves useful when breathing at the surface before descending, without having to use the air in your tank.
Dive Booties and Fins: Fins are to a diver exactly what a tail and fins are to a fish, a means for movement and propulsion underwater. Diving fins are important in terms of helping a diver move with ease, navigate and work again currents. When a diver moves easily and effortlessly underwater using good Scuba fins they in turn conserve more energy, thus using up less of their air supply. Dive booties are neoprene boots worn with fins for a snug fit. (See How good dive fins can make a difference.)
Wetsuit: Wetsuits are more than just dive apparel. Their primary function is for warmth. Made from neoprene, wetsuits preserve body heat by trapping a layer of water against the skin through the material. This water warms up because of body heat and acts as an insulator. Wetsuits unlike dry suits are not good insulators against very cold water but are decent protection from minor thermo clines (changes in water temperature at different depths) and are available in different thicknesses making them suitable for diving in different water temperatures.
Tank: A Scuba tank is where the air a diver breathes is stored. A common misconception about diving is that a diving tank is filled with oxygen, which is not true. For Scuba diving, the regular air we breathe is compressed at about 3,000 psi and filled in the tank/cylinder divers use. It has the same composition of regular air which is around 78% Nitrogen, 21% Oxygen and the remaining other gases.
Buoyancy Compensator (BC)/ Buoyancy Control Device (BCD): A BCD or Buoyancy Compensator is a vest like fitted jacket to which the tank is strapped on and worn by a diver. The BC is connected via a hose to the tank and has air pockets which can be inflated and deflated with a push of a button allowing you to control your depth in the water and also compensating the weight of all the equipment including the tank used by a diver. Another way of inflating a BCD is manually as they have a mouth piece you can blow into.
Weight Belt: People are positively buoyant and therefore need weights to help them descend and stay underwater while diving. Typically weights are added to a belt that goes around your waist or in some cases weights can be put into your BCD pockets. The amount of weight needed differs from person to person depending on body fat and a person’s natural buoyancy.
Regulator: A Scuba regulator is what allows you to breathe underwater. The regulator attaches to the top of the tank and then has a hose connecting it to a mouthpiece allowing you to inhale air underwater. The main function of the diving regulator is that is reduces the pressure of the air that is stored in the tank from 3,000 psi to a safer level and more breathable 140 psi. (See How a Scuba diving regulator works.)
Alternate air source: Your alternate air source is a spare regulator used incase your primary regulator for some reason fails or if you need to share air with your dive buddy if he/she runs out.
Pressure Gauge: Also connected to your tank your pressure gauge indicates how much are is left in your tank during a dive. This gauge is also normally accompanied with a depth gauge on the same console. Sometimes a compass and dive computer can be added to the console.
Dive Computer: All dive computers tell you 4 basic things- Your current depth, your maximum depth during the dive, length of time underwater and how much longer you can stay safely underwater at any particular depth. Depending on the model of computer, it can also tell you much more information and have a lot of different features.
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